Answer:
[tex]996.99 \ m/s[/tex]
Explanation:
Time taken to complete the race, [tex]t=14.3 \ s[/tex].
Average speed, [tex]v=251 \ km/h[/tex].
First we will convert v in [tex]m/s[/tex].
Therefore, [tex]v=\dfrac{251\times 1000}{3600}\ m/s =69.72 \ m/s[/tex].
Now, length of racetrack is given by , [tex]D=v\times t[/tex].
[tex]D=69.72\times 14.3 \ m=996.99 \ m[/tex].
Hence, this is the required solution.